<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8">
    <title>To My Love</title>
    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script> <!-- 确保 jQuery 可用 -->
    <style>
        * {
            padding: 0;
            margin: 0;
        }
        html, body {
            height: 100%;
            padding: 0;
            margin: 0;
            background: #000000;
            font-family: 'Arial', sans-serif;
            color: white;
        }

        .aa {
            position: fixed;
            left: 50%;
            bottom: 10px;
            color: #ccc;
            transform: translateX(-50%);
        }

        .container {
            width: 100%;
            height: 100%;
        }

        canvas {
            z-index: 99;
            position: absolute;
            width: 100%;
            height: 100%;
        }

        #juzhong {
            position: absolute;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
            font-size: 2.5em;
            font-family: 'Pacifico', cursive;
            color: beige;
            text-align: center;
            z-index: 100; /* 确保文字在最上层 */
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
        }

        /* 音频控件样式（可选，隐藏默认控件） */
        audio {
            display: none;
        }
    </style>
</head>
<body>
    <!-- 樱花容器 -->
    <div id="jsi-cherry-container" class="container">
        <!-- 居中显示文字 -->
        <div id="juzhong">
            <!-- 文字内容将由 JavaScript 动态填充 -->
        </div>
        
        <!-- 背景音乐 -->
        <audio autoplay loop>
            <source src="renxi.mp3" type="audio/mp3">
            Your browser does not support the audio element.
        </audio>
        
        <!-- 爱心粒子动画画布 -->
        <canvas id="pinkboard" class="container"></canvas>
    </div>

    <!-- 粒子动画脚本 -->
    <script>
        /*
         * Settings
         */
        var settings = {
            particles: {
                length: 500, // 最大粒子数
                duration: 2, // 粒子持续时间 (秒)
                velocity: 100, // 粒子速度 (像素/秒)
                effect: -0.75, // 效果参数
                size: 30, // 粒子大小 (像素)
            },
        };

        // requestAnimationFrame polyfill
        (function () {
            var lastTime = 0;
            var vendors = ['ms', 'moz', 'webkit', 'o'];
            for (var x = 0; x < vendors.length && !window.requestAnimationFrame; ++x) {
                window.requestAnimationFrame = window[vendors[x] + 'RequestAnimationFrame'];
                window.cancelAnimationFrame = window[vendors[x] + 'CancelAnimationFrame'] || window[vendors[x] + 'CancelRequestAnimationFrame'];
            }
            if (!window.requestAnimationFrame) {
                window.requestAnimationFrame = function (callback, element) {
                    var currTime = new Date().getTime();
                    var timeToCall = Math.max(0, 16 - (currTime - lastTime));
                    var id = window.setTimeout(function () { callback(currTime + timeToCall); }, timeToCall);
                    lastTime = currTime + timeToCall;
                    return id;
                };
            }
            if (!window.cancelAnimationFrame) {
                window.cancelAnimationFrame = function (id) {
                    clearTimeout(id);
                };
            }
        })();

        /*
         * Point class
         */
        var Point = (function () {
            function Point(x, y) {
                this.x = typeof x !== "undefined" ? x : 0;
                this.y = typeof y !== "undefined" ? y : 0;
            }
            Point.prototype.clone = function () {
                return new Point(this.x, this.y);
            };
            Point.prototype.length = function (length) {
                if (typeof length == "undefined")
                    return Math.sqrt(this.x * this.x + this.y * this.y);
                this.normalize();
                this.x *= length;
                this.y *= length;
                return this;
            };
            Point.prototype.normalize = function () {
                var length = this.length();
                this.x /= length;
                this.y /= length;
                return this;
            };
            return Point;
        })();

        /*
         * Particle class
         */
        var Particle = (function () {
            function Particle() {
                this.position = new Point();
                this.velocity = new Point();
                this.acceleration = new Point();
                this.age = 0;
            }
            Particle.prototype.initialize = function (x, y, dx, dy) {
                this.position.x = x;
                this.position.y = y;
                this.velocity.x = dx;
                this.velocity.y = dy;
                this.acceleration.x = dx * settings.particles.effect;
                this.acceleration.y = dy * settings.particles.effect;
                this.age = 0;
            };
            Particle.prototype.update = function (deltaTime) {
                this.position.x += this.velocity.x * deltaTime;
                this.position.y += this.velocity.y * deltaTime;
                this.velocity.x += this.acceleration.x * deltaTime;
                this.velocity.y += this.acceleration.y * deltaTime;
                this.age += deltaTime;
            };
            Particle.prototype.draw = function (context, image) {
                function ease(t) {
                    return --t * t * t + 1;
                }
                var size = image.width * ease(this.age / settings.particles.duration);
                context.globalAlpha = 1 - this.age / settings.particles.duration;
                context.drawImage(
                    image,
                    this.position.x - size / 2,
                    this.position.y - size / 2,
                    size,
                    size
                );
            };
            return Particle;
        })();

        /*
         * ParticlePool class
         */
        var ParticlePool = (function () {
            var particles,
                firstActive = 0,
                firstFree = 0,
                duration = settings.particles.duration;

            function ParticlePool(length) {
                particles = new Array(length);
                for (var i = 0; i < particles.length; i++)
                    particles[i] = new Particle();
            }
            ParticlePool.prototype.add = function (x, y, dx, dy) {
                particles[firstFree].initialize(x, y, dx, dy);
                firstFree++;
                if (firstFree == particles.length) firstFree = 0;
                if (firstActive == firstFree) firstActive++;
                if (firstActive == particles.length) firstActive = 0;
            };
            ParticlePool.prototype.update = function (deltaTime) {
                var i;
                if (firstActive < firstFree) {
                    for (i = firstActive; i < firstFree; i++)
                        particles[i].update(deltaTime);
                }
                if (firstFree < firstActive) {
                    for (i = firstActive; i < particles.length; i++)
                        particles[i].update(deltaTime);
                    for (i = 0; i < firstFree; i++) particles[i].update(deltaTime);
                }
                while (particles[firstActive].age >= duration && firstActive != firstFree) {
                    firstActive++;
                    if (firstActive == particles.length) firstActive = 0;
                }
            };
            ParticlePool.prototype.draw = function (context, image) {
                var i;
                if (firstActive < firstFree) {
                    for (i = firstActive; i < firstFree; i++)
                        particles[i].draw(context, image);
                }
                if (firstFree < firstActive) {
                    for (i = firstActive; i < particles.length; i++)
                        particles[i].draw(context, image);
                    for (i = 0; i < firstFree; i++) particles[i].draw(context, image);
                }
            };
            return ParticlePool;
        })();

        /*
         * 主动画逻辑
         */
        (function (canvas) {
            var context = canvas.getContext("2d"),
                particles = new ParticlePool(settings.particles.length),
                particleRate = settings.particles.length / settings.particles.duration,
                time;

            function pointOnHeart(t) {
                return new Point(
                    160 * Math.pow(Math.sin(t), 3),
                    130 * Math.cos(t) - 50 * Math.cos(2 * t) - 20 * Math.cos(3 * t) - 10 * Math.cos(4 * t) + 25
                );
            }

            var image = (function () {
                var canvas = document.createElement("canvas"),
                    context = canvas.getContext("2d");
                canvas.width = settings.particles.size;
                canvas.height = settings.particles.size;

                function to(t) {
                    var point = pointOnHeart(t);
                    point.x = settings.particles.size / 2 + (point.x * settings.particles.size) / 350;
                    point.y = settings.particles.size / 2 - (point.y * settings.particles.size) / 350;
                    return point;
                }

                context.beginPath();
                var t = -Math.PI;
                var point = to(t);
                context.moveTo(point.x, point.y);
                while (t < Math.PI) {
                    t += 0.01;
                    point = to(t);
                    context.lineTo(point.x, point.y);
                }
                context.closePath();
                context.fillStyle = "#ea80b0";
                context.fill();

                var image = new Image();
                image.src = canvas.toDataURL();
                return image;
            })();

            function render() {
                requestAnimationFrame(render);
                var newTime = new Date().getTime() / 1000,
                    deltaTime = newTime - (time || newTime);
                time = newTime;

                context.clearRect(0, 0, canvas.width, canvas.height);

                var amount = particleRate * deltaTime;
                for (var i = 0; i < amount; i++) {
                    var pos = pointOnHeart(Math.PI - 2 * Math.PI * Math.random());
                    var dir = pos.clone().length(settings.particles.velocity);
                    particles.add(
                        canvas.width / 2 + pos.x,
                        canvas.height / 2 - pos.y,
                        dir.x,
                        -dir.y
                    );
                }

                particles.update(deltaTime);
                particles.draw(context, image);
            }

            function onResize() {
                canvas.width = canvas.clientWidth;
                canvas.height = canvas.clientHeight;
            }
            window.addEventListener('resize', onResize);

            onResize(); // 初始化尺寸
            render();   // 开始渲染
        })(document.getElementById("pinkboard"));
    </script>

    <!-- 显示文字的脚本 -->
    <script>
        // 从 URL 参数中获取名字
        function getUrlParameter(name) {
            name = name.replace(/[\[]/, '\\[').replace(/[\]]/, '\\]');
            var regex = new RegExp('[\\?&]' + name + '=([^&#]*)');
            var results = regex.exec(location.search);
            return results === null ? '' : decodeURIComponent(results[1].replace(/\+/g, ' '));
        }

        // 获取名字并更新页面
        var name = getUrlParameter('name') || '亲爱的';
        document.getElementById('juzhong').innerHTML = `To ${name}<br>我爱你比昨天多一点，比明天少一点`;
    </script>
</body>
</html>